Arizona Rep. Ron Barber is up with his first TV ad for one of the most competitive races in the country.

The 60-second positive spot is narrated by the Democrat's wife, Nancy, and stresses his political independence and deep ties to the Tucson-based 2nd District. Prior to his service in Congress, Barber was a staffer to former Rep. Gabrielle Giffords, whom he succeeded.

"Ron's done what's right for Southern Arizona, not what's easy," Nancy says in the ad. "He loves this place, because this is our home."

www.youtube.com/watch?v=yV4uU24dELc

The spot is backed by a significant broadcast and cable buy, according to a source close to the campaign.